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		<title>Identification - Precursor search in local spectral DB</title>
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<h1>Precursor search in local spectral DB</h1>

<h2>Description</h2>
<p>
Run on any feature list to find putative precursor ions (feature list rows) in a local spectral MS/MS library (formats: MoNA json, NIST msp, GNPS json (internal library submission format), JCAMP-DX jdx).
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<h4>Method parameters</h4>
<dl>
<dt>Peaklist</dt>
	<dd>Select any peaklist</dd>
<dt>Spectral database file</dt>
	<dd>json/msp from MoNA (MassBank of North America)</dd>
	<dd>msp NIST format</dd>
	<dd>JCAMP-DX jdx</dd>
	<dd>mgf format from GNPS</dd>
	<dd>json GNPS (format from the spectral DB submission module)</dd>
<dt>Precursor m/z tolerance </dt>
	<dd>Matches the average row m/z against the precursor m/z of the spectral library entry</dd>	
<dt>Retention time tolerance</dt>
	<dd>Optional: Only used if the DB entry has a retention time</dd>
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